As global temperatures continue to rise, insurance is increasingly emerging as a critical tool for mitigating the financial strain caused by extreme heat, according to Swiss Re’s Rethinking resilience in the face of extreme heat report.
In combination with adaptation measures, insurance transfers risk while delivering valuable financial signals about the effectiveness of initiatives designed to reduce exposures and strengthen societal resilience.
Unlike a single, sudden disaster such as hurricanes or earthquakes, extreme heat represents a fundamentally “different breed of risk, for insurers and for society.”
It functions as a persistent and chronic threat that pervades as baseline temperatures climb, putting steady strain on people, infrastructure, and economic systems.
The severity of the challenge can be seen this year, with the United States marking the June-through-August period as the warmest summer in 131 years of record-keeping.
That same summer saw international temperature extremes intensify, with June readings in the United Kingdom topping 37 degrees Celsius, and western China reporting temperatures that approached 47 degrees Celsius.
People living through heatwaves endure added strains that drive up mortality – extreme heat is estimated to cause around 489000 deaths each year, making it one of the deadliest natural hazards, the report highlights.
Beyond its human toll, extreme heat can also inflict physical damage to infrastructure, interrupt energy supplies, transportation and supply chains, and undermine economic systems.
To confront these compounding pressures, parametric heat insurance is gaining traction as a viable mechanism for providing fast, transparent financial support, Swiss Re notes.
These structures allow affected communities, municipalities, and commercial organisations to quickly respond to acute heat impacts without navigating cumbersome claims processes.
Early programmes already show parametric cover can reach vulnerable populations, particularly in places where traditional insurance has struggled to reach vulnerable populations.
Several buyer groups for parametric products are emerging, including governments, corporates, agriculture and livestock, energy and utilities, customer-facing businesses, and nonprofits and development organisations.
For example, since 2023, the SEWA heat insurance programme has offered financial protection to nearly 50,000 self-employed female workers – such as street vendors and agricultural laborers – when soaring temperatures threaten their health.
Similarly, a parametric insurance solution in a US Southwest city delivers rapid, transparent funding when sustained heatwaves cross set thresholds, helping mitigate severe impacts on vulnerable residents, public services, and infrastructure.
Despite these proven applications, parametric heat insurance has its limitations. Insurance payouts follow heat exposure rather than prevent it. Furthermore, simple triggers struggle to reflect the complex ways heat impacts humans and infrastructure, analysts explain.
Because insurance in isolation cannot solve the challenge posed by extreme heat, risk transfer must be deployed as an element of a broader resilience strategy that prioritises effective adaptation approaches, Swiss Re stated.
Comprehensive frameworks prioritise long-term physical adaptation, the report suggests, such as establishing climate shelters, urban cooling programmes and heat-resistant building materials designed for a hotter century.
When deployed alongside these physical safeguards, risk transfer stands as an important pillar of a comprehensive heat response framework, Swiss Re concluded.
